Method and System for Providing Presence Information

1. A system for distributing presence information among a plurality of devices operated by a corresponding user, the system comprising: (a) the plurality of devices operatively connected to each other through a global computer network; (b) each of the devices having an address book with at least one contact; (c) each of the devices having a display on which the address book can be viewed by the user; (d) each of the devices running a local application with access to the address book and the display, the local application including instructions for carrying out a method for distributing the presence information among a plurality of devices, the method comprising the steps of: (1) accepting a change in authorization for the contact from the user and identifying the contact that is authorized as an authorized contact, verifying that the device is in the contact's address book before authorizing the contact, the device having a link with the authorized contact through the global computer network; (2) updating the presence information of the device; (3) making the presence information available directly to the authorized contact through the link; (4) acquiring the presence information from the contact through the link if the device is an authorized contact of the contact; and (5) including the presence information from the contacts for which the device is an authorized contact when displaying the address book on the display.

2. The system of claim 1 wherein the presence information made available by pushing it to the authorized contact.

3. The system of claim 1 wherein the presence information is made available by sending it to the authorized contact in response to a query from the authorized contact.

4. The system of claim 1 wherein the method further comprises sending the change in authorization to the contact affected by the change directly through the link.

5. The system of claim 1 wherein the method further comprises sending the change in authorization to the contact affected by the change through a server.

6. The system of claim 1 wherein the presence information includes a location of the device.

7. The system of claim 1 wherein the presence information includes a message describing a situation of the user.